American Board of Opticianry (ABO) Test 2025 – 400 Free Practice Questions to Pass the Exam

Refractive errors are conditions that affect the way our eyes bend and focus light, resulting in blurred vision. Options A, C, and D are not classified as refractive errors. Astigmatism, Glaucoma, Cataracts, Dry Eye Syndrome, Conjunctivitis, Uveitis, Retinal Detachment, Macular Degeneration, and Diabetic Retinopathy are all different types of eye conditions, but they do not fall under the category of refractive errors. Therefore, option B is the correct answer. Myopia, hyperopia, and presbyopia are all classified as refractive errors because they involve errors in the way the eye bends light and focuses it onto the retina.